Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 5597a9f31cd3d90a…

MALICIOUS

Office (OLE) / .XLSX

1.19 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: c9e380d1ab79973d892fdcc43bf600fe SHA-1: c69c6a7cbd45001207b2b2652cecead14a10df48 SHA-256: 5597a9f31cd3d90aac870e8a6978d96452a9765ff7118e666016be8444a877ac
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to load remote content. The extracted URL points to a payload that is likely downloaded and executed. Although the VBA project contains no executable statements, the OLE object itself is the vector for exploitation. The file is an Excel spreadsheet, suggesting a lure to entice the user to open it.

Heuristics 2

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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